1. A. Ghiorso et al., Phys. Rev. 98, 1518 (1955)
2. International Union of Pure and Applied Chemistry. Discovery and Assignment of Elements with Atomic Numbers 113, 115, 117 and 118, press release, 30 Dec 2015
3. A. Ghiorso et al., Phys. Rev. Lett. 1, 18 (1958)
4. R.J. Silva et al., Nucl. Phys. A 216, 97 (1973)
5. E.D. Donets, V.A. Shchegolev, V.A. Ermakov, Sov. At. Energy 14, 540 (1963)